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A block of zinc has a density of 7.133 g/cm^3 and atomic weight of 65.39 g. A) Calculate the atom density of the zinc. B) Find the macroscopic thermal neutron absorption cross section for zinc, assuming that microscopic cross section for absorption of zinc is 1.10 barns.
Write the equations for the ionization of 3-aminophenol. Would this substance be more soluble in water at pH 2.0 or pH 8.0? Would you expect this substance to be absorbed into the bloodstream in the stomach or the intestines?
-Calculate the number of mmol of Br2 present in 0.48mL of bromine solution, -Calculate the number of mmol in 100 mg of trans-cinnamic acid (use a MW calculated to 2 decimal places)
the value of electronegativity for magnesium 1.2 and the value for oxygen is 3.5. determine what type of bond is
what is the ph of the solution if .02 mol hcl is added to .5L of a .34m nh3 and .56m nh4cl buffer solution
In an acid-base titration experiment, 50.00 mL of a 0.0500 M solution of acetic acid (ka=1.75 x 10^-5) was titrated with a 0.0500 M solution of NaOH at 25 degree C
An ideal gas mixture containing 65.0 mol% carbon dioxide and 35.0 mol% nitrogen monoxide is to be prepared by allowing gaseous carbon dioxide to fill an evacuated 30.0 L cylinder to a pressure of 2.15 bar. The temperature is 415 K.
when 50.0 gram of metal at 75.0 C is added to 100 grams of water at 15.0 C the temperature of the water rises to 18.3 C. Assume that no heat is lost to the surroundings. What is the specific heat of this metal
hydrogen is collected over water, two gases are present hydrogen and water vapor.calculate partial pressure of hydrogen gas. Barometric pressure = 773.94 mmhg.
in the olympics and other major athletic competitions a gc-ms is used to screen athletes for their use of banned
The average concentration of strontium ion in seawater is 8.00 mg of strontium ion per kg of seawater. What is the molarity of the strontium ion if the density of the seawater is 1.025 g/mL.
Why do you think the enthalpy of activation, (REFER TO THE PICTURE), for a syn-periplanar elimination is higher than that for an anti-periplanar elimination
in other words, why isn't the tetra-alkylated ortri-alkylated product formed? What are the two other isomers (structure and name) that are possible of forming?
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